| Year: | 2020–21 |
| Prev Year: | 2019–20 |
| Next Year: | 2021–22 |
| Team: | Longwood Lancers |
| Sport: | basketball |
| Conference: | Big South Conference |
| Short Conf: | Big South |
| Record: | 12–17 |
| Conf Record: | 10–10 |
| Head Coach: | Griff Aldrich |
| Hc Year: | 3rd |
| Asst Coach1: | Marty McGillan |
| Asst Coach2: | Austin Shaver |
| Asst Coach3: | Donovan Williams |
| Stadium: | Willett Hall |
| Tourney: | CBI |
| Tourney Result: | Quarterfinals |
The 2020–21 Longwood Lancers men's basketball team represented Longwood University in the 2020–21 NCAA Division I men's basketball season. The Lancers, led by third-year head coach Griff Aldrich, played their home games at Willett Hall in Farmville, Virginia as members of the Big South Conference. They finished the season 12-17, 10-10 to finish in 5th place. They defeated UNC Asheville in the quarterfinals of the Big South tournament before losing in the semifinals to Winthrop. They received an invitation to the CBI where they lost in the quarterfinals to Pepperdine.
The Lancers finished the 2019–20 season 14–18, 9–9 in Big South play to finish in fourth place. They lost in the quarterfinals of the Big South tournament to Hampton.
|-!colspan=12 style=| Non-conference regular season|-!colspan=12 style=| Big South tournament|-|-!colspan=12 style=| CBI|-|-Source[1]